Pencil



Mar. 6, 1923.

J. F. LINDBEHG PENCIL.

FILED SEPT.2.1921.

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will!! Patented Mar. 6,1923.

`.roma r. marianne, or cnrcnec, :ILL-mors.

PENCIL.

Application led September 2, 1921. Serial No. 498,018.

To all 'whom t may concern.'

Be it known that l, JOHN F. LINDBERG,

citizen of the United States, residing' at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Pencils, of whichthe following is a full, clear, concise, and exact description.

My invention relates to pencils employing leads or other rods of marking material and includes improved mechanism for moving or feeding the leads to new positions and improved mechanism for maintaining the leads in the positions to which the are advanced.

] pencil embracing all characteristics of my invention is inclusive of a casing, av

marking' element, in the form of a rod formed of marking material, withiny and movable longitudinally of the casing which is open at the writing end of the pencil to permit of the projectlon of the forward end portion of the markin element, a follower rod within and mova lelongitudinally of the casing, said follower rod being engageable with the inner end"y portion of said marking element, a clutch vvithin the casing and manually operable from the exterior of the casing, said clutch, when operated, engaging the follower lrod to effect its forward movement to cause projecting movement of the marking 'element and subseuently permitting reverse movement of t is rod, and an automatically operating clutch within the casiig and interrelated with the follower rod to prevent material return movement thereof. Pencils of this construction form the subject matter of my co-pending application Serial No. 405,036, filed August 21, 1920, the structure o f my present invention being an improvement upon the structure of 'said co-pending application.

I will explain Imy inventlon in detail by reference to the' accompanying drawing showing the preferred embodiment thereof and in which drawing Fig. 1 isa viewv in sectional elevation showin the parts in nor'- mal position; Fig. 2 is 'a view similar to Fig.

1 showin the holding clutch in released position; ig. 3 is a sectional view online 3--3 of Fig. 1; Fig. 4 is a perspective view ofcam mechanism that is 'preferably emspective view of the carrier that is prefand Fig. 6 is a sectionalview, on a larger scale, on line 6 6 of Fig. 1.

Llke parts are indicated by similar characters ofV reference throughout the differ- 'ent figures.

The pencil casin illustrated is in 'the form of a hollow cy inder having an upper section V1 and a lower section 2 in threaded connection at the mid portion 3 of the casing. A tubular guide 4 is coaxial with the casing, and is fixed to and within thecasing section 2.` The rod 5 of lead or other marking material that is in use is moved through the guide 4 to project sufficiently far throughv the hole in the writing end of the pencil casing, said lead being frictiohally held by the guide or the writing end of t e casing to prevent it from Idropping out.

A follower rod 6 is within and 'mov 'ble longitudinallyof the casing and has its Ior-y ward end in thrusting engagement with the inner end of the marking rod. A feeding ring clutch 7 surrounds the follower rod within the casing, this clutch being I normally heldin a released position at right angles to the follower rod and against a positioner, 8 by acoiled spring 9, so that said clutch will permit reverse or iiilvard movement of the follower rod and thefll'ead subsequent to the lead feeding movement of these parts. The abutment 10 for said spring desirably also surrounds but? is free from the follower rod. An actuating rod 11, preferably manually operable from' the exterior of the casing as hereinafter set forth, serves to tilt the clutch and; thereafter to effect its bodily forward movement against th'e force of the spring 9 in order to effect forward movement of. the follower rod and the consequent feeding movement of the lead. ik

second ring clutch 12 also surrounds the follower-rod but is normally held in gripping engagement therewith by the spring 13 normally to prevent return movement of this rod and of the lead whose feeding movement is permitted by this clutch. The follower rod also desirably passes freely through the abutment 14 for this spring. A releasing rod 15, preferably manually operablefrom the exterior of the casing as hereinafter set forth, serves to release the holding clutch 12 by permitting the spring 13 to place said clutch flat against the abutment ,10 so as to be at right angles to the follower rod, said release rod 'fief to constitute the. bottom end wall 14, which is also the abutment for the sp-ring 13, and the top end wall 17. The elements 8 and 10 of the clutch mechanism are desirably struck inwardly from one of the side walls of the hollow clutch carrier.

When the sections 1 and 2 of the pencil casing are screwed together, the clutch carrier is clamped thereby between the inner o yend of the pencil casing section 2v and the inner end of the plug 18 fixed tightly in the outer end of the pencil casing section 1.

' The releasing rod 415 is also now held by the holding clutch spring 13 tightly between the plug 18 and said clutch to serve asa positioner to enable the spring to apply the holding clutch to the follower rod.

When the pencil casing sections 1 and 2 are-screwed apart to a limited extent (Fig. 2), the spring 19, within afcavity in the plug, presses upon the upper end ofthe clutch carrer and maintains the lower end of V thiscarrier against the upper end of the pencil casing section 2. ln this operation `:hay space between the spring abutment 14 amithe plug 18 is' increasedj to permit the spring 13 to place the holding clutch 12 fiat against the positioner 10 2) so that the follower rod maybe moved inwardly. This adjustment is effected whenever the lead is to be pushed back into the casing or when the follower rod is to be moved upwardly to permit of the insertion of a new lead, which may be admitted to the casing through the front or writing end thereof. Thus the engaging threaded ends of the pencil casing sections u1 and 2 have cam-like action to bring the holding clutch into and out of action.

The feeding 0r actuating rod 11 is of such length as to. be normally engaged at one end with its actuating element 20, while having its other end in engagement with the feeding clutch 7 when this clutch is in its normal follower rod releasing position. rllhe actuating rod is thus in readiness to tilt the clutch 7 and effect its forward bodily feeding movement whenever the actuating element 2.0 is operated. This actuating element is desirably in the form of a cam 21 journaled upon the smooth port-ion of the stem of screw 22, the head of this screw and the outer end of plug 18 confining the cam to a single plane of rotation with respect to the pencil casing section 1. Said cam desirably has twoj cam formations 21 upon its inner Vend. W hen the cam is turned a half revolution, one of these formations 21 depresses the actuating rod that, in turn, tilts the ring clutch 7 and thereafter effects its bodily forward movement to effect forward movement of the follower rod which then` pushes the lead forward. When the. actuating rod escapes the cam, the clutch spring 9 immediately raises the actuating rod to normal position and restores the clutch to the follower rod releasing position shown in Figi, the holding clutch now functioning to prevent return movement of the follower rod and lead.

rlhe outer end of the cam element 20 may l'be of tubular form to receive a rubber eraser While 1 have herein shown and particularly described the preferred embodiment of my invention I do not wish to be limited to the precise detailsof construction shown as changes may readil be made without departing from the spirit of my invention, but having thus described my invention claim as new and desire to secure by Letters Patent the following l '-1. A pencil including a casing formed in upper and lower sections that are in threaded connection; a marking element in the form of a rod formed of marking material, within and movable longitudinally of the` casing which is open at the writing end of the pencil to permit of the projection of the forward end portion of the marking element; a follower 'rod within and movable longitudinally of the casing, said follower rod being engageable with the inner end portion of said marking element; a clutch within the casing and normally operable from the exterior of the casing, said clutch, when. operated, engaging the follower rod to ef- ,e fect its forward movement to cause projecting movement of the marking element and subsequently permitting reverse movement of this rod; an automatically operating clutch within the casing and interrelated with the follower rod to prevent material return movement thereof; and a carrier for said clutches that is disposed within the upper casingy section and is engaged by the upper end of the lower pencil section and held thereby in assembly with and within the upper pencil section. Y

2. A .pencil including a casing formed in upper and lower sections that are in threaded connections; a marking element in the foi-m of a rod formed of marking material, within and movable longitudinally of the casing which is open at the writing end of the pencil to permit of the projection of the forward end portion of the marking element; a follower rod within and- .movement of this rod; an automatically operating clutch within the casing and inter'- related with the follower rod to prevent material return movement thereof; a carrier for said clutches that is disposed within the upper casing section and is engaged by the upper end of the lower pencil section and held therebyJ/iIr/,assembly with and within the upperfpencil section; a spring within the casing and engaging the clutch carrier to maintain it in engagement with theupper end of the lower casing section when said sections are partially unscrewed.; and a positioner within the upper casing and en gaging the holding clutch to enable this clutch to function and releasing the clutch when the casing sections are unscrewed.l

3. A pencil including a casing formed in upper and lower sections that are in threaded connection; a marking element in the form of a rod formed of marking material, within and movable longitudinally of the casing which is open at the writing end of the pencil to permit ofthe projection of the forward end portion of the marking element; a follower rod within and movable longitudinally of the casing, said follower rod being engageable with the inner end por-v tion of saidrmarking element; a clutch within the casing and normally operable from the exterior of the casing, said clutch, when operated, engaging` the follower rod to effects its.-v forward movement to cause pro-V jecting movement of the marking element and subsequently permitting reverse movement of this rod; an automatically operating clutch within the casing 'and interrelated with the follower rod to prevent maf` terial return movement thereof; aA carrier for said clutches that is disposed within the upper casing section and is engaged by the upper end of the lower -pencil section and held thereby in lassembly with and within the upper pencil section; and a spring within the caslng and engaging the clutch carrier to maintain itin engagement with the upper end of the lower casing section when `said sections are partially unscrewed, the

upper casing section being in positioning relatlon with the holding clutch when the casing sections are screwed together to enable the holding clutch to function and releasing the holding clutch when the casing sections are unscrewed.

4;A pencil including a casing formed in upper and lower sections that are in thread edconnection; a marking element in the form of a rod formed of marking material,

within anmmovabie longitudinally of the,

casing which is open at the writing end of the pencil to permit of the projection of the forward end portion of the working ele# ment; a follower rod within and movable longitudinally of the casing, said' follower` rod being engageable with the inner end portion of said marking element; an automatically operating clutch within the casing and interrelated with the follower rod ta prevent material return movement thereof; and a -carrier for said clutch that is disposed within the upper casing section and is engaged by the upper end of the lower pencil section and held thereby in assembly with and within the upper`pencil. section. 5. A pencil including a casing formed in upper and lower sections that are in threaded connection; av marking element in the form'of a rod formed of marking material, within and movable longitudinally of the casing which is open at the writing end of the pencil to permit of the'projection of the forward end portion of the marking element; a follower rod within and movable longitudinally of the casing, said follower rod being engageable with the inner end portiony of said marking element; a clutch within the casing and normally operable from the exterior of the casing, said clutch, when operated, engaging the follower rod to effect its forward movement to cause projecting movement of the marking element and subsequently permitting reverse movement of this rod; and a carrier for said clutch that is disposed within the upper casing section and is engaged by the upper end of the lower pencil section and held thereby in assembly with and within the upper pencil section.

6. A pencil including a casing formed in upper and lower sections that are in threaded connection; a marking elemfent in the formof a rod formed of marking material, within and movable longitudinally of the casing which is open at the writing end of the pencil to permit of the projection of the forward end portion of the marking element; a follower rod within and movable longitudinally of the casing, said follower rod being engageable with the inner end portion of said marking element; an automaticasing and engaging the holding clutch to venable this clutch to function. and releasing `ed connection; a marking element in the Y form of a rod ,formed of marking material, within and movable longitudinally of the casing which is open at the writing end of the pencil to permit of the projection of the forward end portion of the marking element; a follower rod within and\movable longitudinally of the casing, said follower rod being engageable with the inner end portion of said marking element; an automatically operating clutch within the casing and interrelated with the follower rod to prevent material return movement thereof;4 a carrierl for said clutch thatis disposed within the upper casing'section and is engaged by the upper end of the lower pencil section and held thereby in assembly with and within the upper pencil section; and a spring within the casing and engaging the clutch carrier to maintain it in engagement with the upper end of the lower casing section when said sections are partially unscrewed, the upper casing section, being in positioning relation with the holding clutch when the casing sections are .screwed together to enable the holding clutch to function and releasing the holding clutch when the casing sections are unscrewed.

8. A. pencil including a casing formed in upper and lower sections that are in threaded connection; a marking element, in the form of a rod formed of marking material, within and movable longitudinally of the casing which is open at the writing end of the pencil to permit of the projection of the forward end portion of the `marking element; a follower rod within and movable longitudinally of the casing, said follower rod being engageable with the inner end portion of said marking element: and an automatically operating clutch within the casing and interrelated with the followerrod to prevent material return movement thereof,

this clutch being governed by said casing sections and made e'ective when the casing sections are screwed together and released when said casing Sections are screwed apart.

9. A pencil including a casing; a marking element, in the form of a rod formed of marking material, within and movable longitudinally of the casing which is open at the writing end of the pencil to permit of the projection ofthe forward end portion of the marking element; a follower rod within and movable longitudinally of the casing,y

said follower rod being engageable with the inner end portion of said marking element;

a clutch within the casing and manually operable from the exterior of the casing, -said clutch, when operated, engaging the operable cam in .rotative co l the pencil casin and in actuating relation toV lto cause projecting movement of the marking element and subsequently permitting reverse movement of this rod' a manually lineman with the aforesaid c utch; and an automatically operatin clutch within lthe casing and interrelate with the follower rod to prevent material return movement thereof.

10. A. pencil including a casing; a marking element, in the form of a rod formed of .marking material, within and movable longitudinally of the casing which is open at the y writing end of the pencil to permit of the projection of the forward end portion of the marking element; a follower rod within andmovable longitudinally of the casing, said follower rod being engageable with the inner end portion of said marking element; a clutch within the casing and manually operable from the exterior of the casing, Said clutch, when operated, engaging the follower rodI 4'to e'ect its forward movement to cause projecting movement of the marking element and subsequently permitting Ireverse movement of this rod; an actuating rod'within the casing for operating said clutch; a ma-nually operable cam in rotative connection with the pencil casing and in actuating relaatl tion to said actuating rod; and an automatiF y cally operating clutch within the casing and interrelated with the follower rod to prevent .material return movement thereof.

' A pencil including a casing; a marking'element, in the form of a rod formed of marking material, within and lmovable longitudinally of the casing which is open at `the writing end of the pencil to permit of the projection `of the forward end portion of the marking element; a follower rod within and movable longitudinally of the casing, said follower rod being engageable with the inner end portion of said marking element; a clutch within the casing and manually operable from the exterior of thecasing, said clutch, whenoperated, engaging the follower rod to eifect its forward movement to cause 'projecting movement of the marking element and subsequently permitting reverse movement of this rod; and a manually operable cam in rotative connection with the pencil casing and in actuating relation to the aforesaid clutch.

l2. A' pencil including a casing; a marking element, in the form of a vrod formed of marking'material, within and movable longitudinally of the casing which is open at the writing'end of the pencil to permit of the projection of the forward end portion ofthe marking element; a follower rod within and movable longitudinally of the casing, said follower rod being engageable with the inner end portion of said marking element; a clutch within the casing and rotative connection with the pencil casing and 1n actuating relation to said actuatlng rod.

In Witness whereof, I hereunto subscribe my name this fourteenth day of February,

JOHN F. LINDBERG. 

